M2.5 earthquake — 40 km W of Petrolia, CA
An magnitude 2.5 earthquake occurred 40 km W of Petrolia, CA on Sep 22, 2026 at 19:00 UTC. The epicenter was at a depth of 2 km — a shallow earthquake. Shallow quakes concentrate their energy near the surface, so they tend to produce stronger shaking close to the epicenter.
Event data
| Magnitude | M2.5 |
|---|---|
| Depth | 2.0 km |
| Coordinates | 40.355, -124.752 |
| Time | Sep 22, 19:00 UTC |
| Location | 40 km W of Petrolia, CA |
| USGS event ID | nc75440082 |
What this magnitude typically means
Very small earthquakes are usually only detected by instruments and are rarely felt. They are a normal part of background seismic activity. Tremor does not compute a single local shaking figure here, because how strong a quake feels at any address depends on distance, depth and local geology — open the interactive globe to explore the ShakeMap and estimated intensity.
Nearby recent earthquakes
| Magnitude | Distance | Time (UTC) | Location |
|---|---|---|---|
| M2.6 | 13 km | Sep 22, 15:23 UTC | 47 km WNW of Petrolia, CA |
| M4.7 | 61 km | Sep 29, 11:36 UTC | 100 km W of Petrolia, CA |
| M2.6 | 171 km | Sep 27, 19:10 UTC | 9 km NW of Redwood Valley, CA |
| M2.7 | 185 km | Sep 26, 04:02 UTC | 10 km W of Boonville, CA |
| M3.7 | 185 km | Sep 26, 03:42 UTC | 10 km W of Boonville, CA |
| M3.2 | 243 km | Sep 28, 13:30 UTC | 275 km W of Indianola, California |
Earthquake activity in this area
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Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.